| SPMD Control {pbdMPI} | R Documentation |
These sets of controls are used to provide default values in this package.
Objects contain several parameters for communicators and methods.
The elements of .pbd_env$SPMD.CT are default values for controls
including
| Elements | Default | Usage |
comm | 0L | a communicator index |
intercomm | 2L | an inter communicator index |
info | 0L | an info index |
newcomm | 1L | a new communicator index |
op | "sum" | an operation |
port.name | "spmdport" | an operation |
print.all.rank | FALSE | if all ranks print message |
print.quiet | FALSE | if print/cat rank information |
rank.root | 0L | a rank of root |
rank.source | 0L | a rank of source |
rank.dest | 1L | a rank of destination |
request | 0L | a request index |
serv.name | "spmdserv" | a service name |
status | 0L | a status index |
tag | 0L | a tag number |
unlist | FALSE | if unlist returning |
divide.method | "block" | a way to divide jobs or data |
mpi.finalize | TRUE | if shutdown MPI |
quit | TRUE | if quit when errors occur |
msg.flush | TRUE | if flush message for comm.cat/comm.print |
msg.barrier | TRUE | if barrier message for comm.cat/comm.print |
Rprof.all.rank | FALSE | if call Rprof on all ranks |
lazy.check | TRUEE | if use lazy check on all ranks |
The elements of .pbd_env$SPMD.OP list the implemented operations for
reduce() and allreduce(). Currently, four operations are
implemented "sum", "prod", "max", and "min".
The elements of .SPMD.IO are default values for input and output
including
| Elements | Default | Usage |
max.read.size | 5.2e6 | max of reading size (5 MB) |
max.test.lines | 500 | max of testing lines |
read.method | "gbd" | default reading method |
balance.method | "block" | default load balance method |
where balance.method is only used for "gbd" reading method when
nrows = -1 and skip = 0 are set.
The elements of .pbd_env$SPMD.TP are default values mainly for
task pull including
| Elements | Default | Usage |
bcast | FALSE | if bcase() objects to all ranks |
barrier | TRUE | if call barrier() for all ranks |
try | TRUE | if use try() in works |
try.silent | FALSE | if silent the try() message |
See task.pull() for details.
|
Wei-Chen Chen wccsnow@gmail.com, George Ostrouchov, Drew Schmidt, Pragneshkumar Patel, and Hao Yu.
Programming with Big Data in R Website: http://r-pbd.org/